Precision measurement of the mass and lifetime of the Ξ<sup>0</sup><inf>b</inf> Baryon

R. Aaij, R. Aaijsp, B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, S. Akar, J. Albrecht, F. Alessio, M. Alexander, S. Ali, G. Alkhazov, P. Alvarez Cartelle, A. A. Alves, S. Amato, S. Amerio, Y. Amhis, L. An, L. Anderlini, J. AndersonR. Andreassen, M. Andreotti, J. E. Andrews, R. B. Appleby, O. Aquines Gutierrez, F. Archilli, A. Artamonov, M. Artuso, E. Aslanides, G. Auriemma, M. Baalouch, S. Bachmann, J. J. Back, A. Badalov, V. Balagura, W. Baldini, R. J. Barlow, C. Barschel, S. Barsuk, W. Barter, V. Batozskaya, V. Battista, A. Bay, L. Beaucourt, J. Beddow, F. Bedeschi, I. Bediaga, S. Belogurov, K. Belous, I. Belyaev, E. Ben-Haim, G. Bencivenni, S. Benson, J. Benton, A. Berezhnoy, R. Bernet, M. O. Bettler, M. Van Beuzekom, A. Bien, S. Bifani, T. Bird, A. Bizzeti, P. M. Bjørnstad, T. Blake, F. Blanc, J. Blouw, S. Blusk, V. Bocci, A. Bondar, N. Bondar, W. Bonivento, S. Borghi, A. Borgia, M. Borsato, T. J.V. Bowcock, E. Bowen, C. Bozzi, T. Brambach, J. Van Den Brand, J. Bressieux, D. Brett, M. Britsch, T. Britton, J. Brodzicka, N. H. Brook, H. Brown, A. Bursche, G. Busetto, J. Buytaert, S. Cadeddu, R. Calabrese

Resultado de la investigaciónrevisión exhaustiva

33 Citas (Scopus)

Resumen

Using a proton-proton collision data sample corresponding to an integrated luminosity of 3 fb -1 collected by LHCb at center-of-mass energies of 7 and 8 TeV, about 3800 Ξ0 b Ξ + cπ -, Ξ c+ pK -π + signal decays are reconstructed. From this sample, the first measurement of the Ξ 0 b baryon lifetime is made, relative to that of the Λ 0 b baryon. The mass differences M(Ξ 0 b) - M(Λ 0 b) and M(Ξ c+) - M(Λ c+) are also measured with precision more than 4 times better than the current world averages. The resulting values are (Equation presented) where the first factor is the ratio of fragmentation fractions, b Ξ 0 b relative to b Λ 0 b. Relative production rates as functions of transverse momentum and pseudorapidity are also presented.

Idioma originalEnglish
Número de artículo032001
PublicaciónPhysical Review Letters
Volumen113
N.º3
DOI
EstadoPublished - 15 jul 2014
Publicado de forma externa

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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